Have younger American cohorts stopped seeing mortality improvements?
Core argument: By 2019, before COVID, the US Class of 1980's death rates at age 39 exceeded those of the Classes of 1970 and 1960, and the Class of 1990's death rates at age 29 were indistinguishable from the Class of 1950's.
The awful truth remains: By 2019—that is, even before COVID—the Class of 1980’s death rates at age 39 were higher than their counterparts’ from the Classes of 1970 and 1960. At age 29, the Class of 1990’s death rates were indistinguishable from those of the Class of 1950. In Japan, the Class of 1990’s mortality rate at age 29 was over 80 percent lower than those of their “grandparents” from the Class of 1930. In the US, the corresponding differential was less than 8 percent. If we look carefully at Figure 2, we can see unwelcome “crossovers”—where death rates in adulthood exceeded those of earlier cohorts—for every US cohort from the Class of 1950 onward in the years after the Berlin Wall fell (1990 onward). This is what prolonged stagnation—at times, even reversal—in national health progress looks like.

